I'm with Hawkingbird. They should use some of the established SHIELD agents in the show since it is connected to the MCU. SHIELD has a long, rich history that shouldn't go to waste. Other than Nick Fury himself, only Sitwell and Hill have been imported from the comics, which is a shame in light of all of the agents they could use.

In all fairness, a good chunk of the "name" SHIELD characters got pretty much written out of MCU continuity with the 70-year gap from WWII until now....let's face it, the modern MCU won't include Dum-Dum Dugan, Gabe Jones, Izzy Cohen or Dino Manelli, who would all long since be dead (or at least 90-100 years old). And they won't likely use any of the actual supers like Spider-Woman (any version) because (a) they'll want to reserve the possibility of developing those on the *big* screen and (b) it'd run contrary to Joss' theme for the TV show, which is about normal humans interacting with a superhero universe.

Still, I'd like to see some "name" agents show up, even if it's just one-episode cameos. It's surprising that Sitwell (Max Hernandez) from the movies wasn't offered a role.